PROBLEM TO BE SOLVED: To suppress reduction in control property of a motor.SOLUTION: A motorcar executes switching between first PWM control where first PWM signal is generated by comparison of voltage instruction with carrier wave voltage for each phase so as to execute switching of a plurality of switching elements and second PWM control where second PWM signal is generated based on modulation ratio, voltage phase and pulse number so as to execute switching of the plurality of switching elements. In addition, upon execution of the second PWM control, if voltage phase change amount Δθp as change amount of voltage phase θp reaches pulse width Δθstmp as difference in switching angle θs (180 to S200), switching to the first PWM control is executed (S230).SELECTED DRAWING: Figure 2
【課題】モータの制御性が低下するのを抑制する。【解決手段】各相の電圧指令と搬送波電圧との比較手によって第1PWM信号を生成して複数のスイッチング素子のスイッチングを行なう第1PWM制御と、変調率と電圧位相とパルス数とに基づいて第2PWM信号を生成して複数のスイッチング素子のスイッチングを行なう第2PWM制御と、を切り替えて実行する。そして、第2PWM制御の実行中に、電圧位相θpの変化量としての電圧位相変化量Δθpがスイッチング角θsの差分としてのパルス幅Δθstmp以上になったときには(180〜S200)、第1PWM制御に切り替える(S230)。【選択図】図2
MOTORCAR
自動車
2017-11-02
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |